The xterm program is the standard terminal emulator for the X Window System. It provides DEC VT102/VT220 and Tektronix 4014 compatible terminals for programs that can't use the window system directly. If the underlying operating system supports terminal resizing capabilities (for example, the SIGWINCH signal in systems derived from 4.3bsd), xterm will use the facilities to notify programs running in the window whenever it is resized.

rlwrap is a readline wrapper, a small utility that uses the GNU readline library to allow the editing of keyboard input for any other command. It maintains a separate input history for each command, and can TAB-expand words using all previously seen words and/or a user-specified file.

GNU TeXmacs is a free wysiwyw (what you see is what you want) editing platform with special features for scientists. The software aims to provide a unified and user friendly framework for editing structured documents with different types of content: text, mathematics, graphics, interactive content. TeXmacs can also be used as an interface to many external systems for computer algebra, numerical analysis, and statistics. New presentation styles can be written by the user and new features can be added to the editor using Scheme.

SERVID is an intellegent RS232 video terminal
(4x20 character display) in one chip; the Ubicom
(formerly Scenix) SX microcontroller. Using only
some resistors, the program generates NTSB or PAL
video signals via software (bit banged).

DataReel is a free, cross-platform database and communications toolkit. It can
be used to rapidly develop and deploy multi-threaded database and
communications applications. The DataReel toolkit is composed of a modular C++
library designed to build cross-platform infrastructures for end-user
applications, embedded systems, and reusable libraries. DataReel's unique
modular design simplifies adaptation, allowing you to determine the level of
complexity. DataReel makes Internet connectivity and database programming easy.

Serial Over IP is a tool for the transport of serial
interfaces over UDP/IP. It is usefull for connecting
distant equipment that run via a serial interfaces to
a local computer. It requires two computers that
are running Linux and are connected via IP.

WinConnect is a software solution that enables Linux-based PCs and Thin Client devices (such as terminals, Internet/information appliances, and PDAs) to connect to a Windows server to run Windows applications over a network or via the Internet. The low-data transmission bandwidth required by WinConnect will even allow a remote connection over a dial-up or wireless connection to access data and run Windows applications wherever the user may need it.

checkraid is a very simple Perl script for
monitoring some external RAID devices connected to
a Unix/Linux PC via a serial device. It works with
(at least some) EasyRAID, Infotrend, Chaparral, and StorCase InfoStation S10H112
RAID devices.